But, from what I've read, not sure that will prevent intrusion.

He places a chair against the door, to prevent unwelcome intrusion.

Individuals negotiate boundaries to prevent intrusion on each others space.

This is done to deny services to hosts not known and prevent intrusion in the inside network.

However, I have an idea that might prevent further intrusions into our airspace.

They roll up the windows and lock the doors to prevent intrusion.

It has been totally counterproductive and every effort will be made in future to prevent similar intrusions.

A lockdown is an emergency response to prevent escape or intrusion.

It is important to prevent such intrusions, and to be able to detect them as often as possible.

Captain Clarke, I desire you to stand at the inside of the door and to prevent intrusion.